Symphytum asperum Lepech.

• Authority

  Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

• Family

  Boraginaceae

• Scientific Name

  Symphytum asperum Lepech.

• Description

  Species Description - Much like no. 1 [Symphytum officinale L.]; hairs of the stem and infl stouter, flattened, often recurved; lvs not decurrent, or only shortly (to 1 cm) and narrowly so; cor pink, turning blue; filaments narrower than the anthers; connective not projecting; nutlets roughened. Native of the Caucasus region, occasional in waste places across the n. part of our range, Que. to B.C. June–Aug. (S. asperrimum) S. tuberosum L., with a rhizome that is tuberous-thickened at intervals and with slender cauline hairs as in no. 1, but nondecurrent lvs as in no. 2, has been reported as adventive in N. Engl.

• Common Names

  rough comfrey